IKN UL Certified 100-240V AC to DC 9V 1000mA Converter Wall Charger Power Supply Center-Positive US Plug Adapter Regulated AC to DC switching power supply with flat-in US plug, center positive. High quality with UL certified,testing is fine. Input:Word wide AC 100-240V,50-60Hz. Output:DC 9V 1000mA. Wall chager power supply adapter,can be used at home,office and etc.